Thank you for using the Jiskha Homework Help forum. Were you given a list of words to use? Often it has to do with the vocabulary presented in a certain chapter of your textbook. Since I know neither your text nor the chapter, here are some choices that might work.

1. clase
2. examinar
3. medicina
4. fiebre
5. What is "El" referring to? Certainly not "la gripe." "la razón" but with the space, that's 8. Try "posible" but then I wouldn't use "tengo"
6. diagnosis
7. Since you don't say how many letters, there is no hint! "energía"